We are in the process of moving to Crowd for authentication of Jira, FishEye and Bamboo. We've been using Jira for a few years now and have all our users there. Now that we're using Crowd for authentication successfully, can we delete the users in Jira? There's fear that a change to Jira datastore (for example updating Jira) might affect users somehow, or that it might get out of sync w/Crowd.